I just figure I can't stunt a foot tall plant in a 2l bottle.so that size would be about perfect...my first grow ever was bag seed in 8 inch pots I only got 9 gs off 3 plants!!!! It took 4 months to flower lol that's when I used CFls and didn't know shit about the herb...now I've got 4 books,DVD set, n nice guys on Riu to help out n give advice, but I've learned the hard way that there are some dummies on here so you can't ever trust one person unless they have been on here a while.Warlock,uncle buck/Ben, sub cool and ppl like that but even those guys disagree on certain things... Learned to becareful n study up, this is my 4th successfull grow had a few in the past I abandoned... Once I moved, once our trifecta guerrilla group broke,and one where I nute burned everything lol, my next cfl grow I got 2zips, than I got a MH/hps had a half grow I got 2 out of as well but not these jds but the next one I should be pulling betwee 6 and 12..., just a learning process...untill I can get to a better state n have multiple tents